DynaPrep MDSF 1218 Split Frame 4HP Pneumatic Kit DynaPrep MDSF Split Frame 1218 12in-18in OD (DN300 - 450) Pneumatic Kit, rotating split ring style OD mounted machine tool, often referred to as clamshells, designed to cut, bevel, single point and counterbore pipe. Kit is complete with 1218 rotating ring set, 1 extended parting tool slide, 1 extended beveling tool slide, no-time starwheel feed, Pneumatic drive, operating hand tools, manual and storage case. Wachs DynaPrep MDSF modular design split frames are named for their ability to split in half for mounting to the outside of inline pipe. It maintains the low clearance design of our previous LCSF series, but builds on that legacy with dozens of innovations and features to make it more powerful, more versatile and faster to setup and operate. It redefines the standard in portable, cold cutting machine tools.